| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 21, 2025 | May 19, 2025 | 000-30319 |
| 4 | Open Document | Open Filing | 4 | Apr 22, 2025 | Apr 18, 2025 | 000-21392 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 20, 2024 | Jun 17, 2024 | 000-30319 |
| 4 | Open Document | Open Filing | 4 | Apr 19, 2024 | Apr 18, 2024 | 000-21392 |
| 4 | Open Document | Open Filing | 4 | Jul 21, 2023 | Jul 21, 2023 | 000-21392 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 24, 2023 | May 22, 2023 | 000-30319 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Mar 10, 2023 | Feb 28, 2023 | 000-21392 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 27, 2022 | Apr 25, 2022 | 000-30319 |
| 4 | Open Document | Open Filing | FORM 4 | May 20, 2021 | May 14, 2021 | 000-30319 |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | Oct 20, 2020 | Oct 20, 2020 | 001-39640 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 28, 2020 | Apr 24, 2020 | 000-30319 |
| 4 | Open Document | Open Filing | 4 | May 24, 2019 | Apr 24, 2019 | 000-30319 |
| 4 | Open Document | Open Filing | 4 | Aug 13, 2018 | Aug 9, 2018 | 000-17082 |
| 4 | Open Document | Open Filing | FORM 4 - | Apr 26, 2018 | Apr 24, 2018 | 000-30319 |
| 4 | Open Document | Open Filing | FORM 4 - | Feb 14, 2018 | Feb 12, 2018 | 000-30319 |
| 3 | Open Document | Open Filing | FORM 3 - | Feb 14, 2018 | Feb 12, 2018 | 000-30319 |
| 4 | Open Document | Open Filing | 4 | Aug 2, 2017 | Aug 1, 2017 | 000-17082 |
| 3 | Open Document | Open Filing | 3 | Aug 2, 2017 | Aug 1, 2017 | 000-17082 |